Island



(No Model.)

V. W. MASON.

HOISTING MACHINE.

No. 397,243. Patented Feb. 5, 1889..

WITNESSES.- 6%..

ATTORNEY,

N. PEIERS. Pholflilhogmphor, Wishinginn. D. a

UNITED STATES PATENT anion.

VOLNEY \V. MASON, OF PROVIDENCE, RHODE ISLAND.

HOISTING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 397,243, dated February 5, 1889.

Application filed March 31, 1888. Serial No. 269,118. (No model.)

To aZZ whom, it may concern.-

Be it known that I, VoLNEv W. Mason, of Providence, in the county of Providence and State of Rhode Island, have invented a new and Improved I Ioistin g-M achine, of which the following is a full, clear, and exact description.

The object; of the invention is to provide a new and improved hoisting-machinc which is very simple and durable in construction and ettective in operation.

The invention consists of eccentrics on which the hoisting-drum is mounted, and of. a lever for operating the said eccentrics so as to throw the drum alternately in and out of contact with the driving-pulley and the brake-shoe.

The in vcntion also consists of certain parts and details and combinations of the same, as will be fully described hereinafter, and then pointed out in the claims.

Reference is to be had to the acwompanying drawings, 'Forn'iing' apart of this specification, in which similar letters of reference indicate correspondi11g" parts in all the figures.

Figure is an end elevation, partly in section, of the improvement. Fig.2 is a sectional side elevation of the same on the line 00 a" of 1 and Fig. 3 is a reduced side elevation of the improvement.

The hoisting-mac]line is provided with suitable hangers or standards, A A, adapted to be fastened to cross-beams B, held in the ceiling of the room in which the machine is located. Instead of standards, a suitable frame maybe constructed to carry the apparatus. On the upper parts of the standards A A is mounted in suitablebearings the main driving-shaft C, carrying the driving-pulley D, of any approved construction, n'et'erably provided, however, with a rim made of paper or other suitable material.

The driving-pulley l) is adapted to engage the wheel E, secured or formed on the hoisting-drum F, on which the hoisting-rope la" is wound. The hoisting-drum F is mounted on a shaft, G, having its hearings in the eccentrics H II, mounted to rotate in bearings I, formed on the standards A A. To the outer faces of the eccentrics H H are secured the ends J of the forked lever J, connected at its outer end with a rope, K, extending upward and passing over the pulleys L L and then downward at any suitable distance from the hoisting-niacinne. The hoisting-rope F also passes over a pulley, F and then extends downward either inside or outside of the building, as may be desired.

The lower part of the wheel E is adapted to engage the brake-shoe N, provided with alining', N, of leather or other suitable material, and the said brake-shoe is provided with downwardly-extcnding lugs N which straddle the square part 0 of a rod, 0, passing through vertical slots A, formed in the lower ends of the standards A A. Set-screws Q screw into the lower ends of the said standards and against the bottom of the rod 0, so as to adjust the latter vertically in the said standards A A. From the square part 0 of the rod 0 projects downward a pin, 0 which fits into a corresponding slot formed in the bolt P, secured to the lugs N of the brake-shoe N.

The operation is as -follows: \Vhen the ma chine is in the position shown in Fig. 3, the wheel E of the hoisting-drum'F rests on the brake-shoe N and is disconnected from the driving-pulleyD, so that the hoisting-drum F is at a standstill. N ow, when the operator desires to wind up or unwind the hoisting-rope F, carrying the load, he pulls downward on the rope K in the direction of the arrow to, so that the lever J swings upward, and thereby turns the eccentric H in its bearings I on the standards A A. This turning of the eccentrics H causes an upward movement of the shaft G, supporting the hoisting-drum I whereby the wheel E of the said hoisting-drum is disconnected from the brake-shoe N and is thrown into frictional contact with the driving-pulleyl). The rotary movement of the drivingpulley l) is then imparted to the wheel E, with which it is in frictional contact, so that. the 'I1oisting'- lr1iin F is rotated and the rope ll" is wound on. the hoisting-drum. \Vhen the operatordesires to lower the load carried by rope F, he simply slacks the rope K just far enough to allow bar J to fall and cause the wheel E to drop by gravity out of contact with pulley D, whereupon, the drum F being; free, the load on the rope F will descend by gravity. hen the operator clesires to stop winding or unwinding the rope F, he releases his hold on the rope K, so that v the lever J swings downward by its own weight,

whereby the eccentrics H are turned in an opposite direction, and the shaft G is moved downward, whereby the wheel E is thrown in contact with the brake-shoe N. As the latter is stationary, a t'urther rotary movement of the wheel E is prevented.

The wear on the brake-shoe N is compensated for by adjusting the set-screws Q, so as to raise the rod 0, supporting the l )rake-shoe N. The latter is seen rely held in place on the square part 0 of the rod 0, and is prevented from moving side'wise by the bolt P engaging the projection (1) ol? the said rod 0. Thus it will be seen that the maehine is very simple and durable in construction, and can easilybe stiorii 'ied or started by the operator pulling or relezlsing the rope K.

By the arrangement or disposithm oi. the (,lriving-wheel 1) directly over the wheel E of the hoisting-drum and the arrangemei'lt or disposition ot' the brake directly under the wheel E of the hoisting-drum, I secure the tollowing im port ant advantage, which I believe to be a new feature in ho :tingmachines,

namely: The weight or gravity of the operate ing-lnn- J becomes added to the weight or gravity of the hoisting-drum and its wheel E, so that when the bar J is allowed to fall the combined weight of all these parts acts by gravity to carry down the wheel E into contact with the brake-shoe N. Thus the load can be arrested and held at any desired position simply by slacking the rope K, and thus allowing the bar J to fall.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a hoisting-machine, the combination, with the eccentrically mounted hoistingdrum, its wheel, and operating-bar, of the driving-wheel arranged directly above the drumwheel and the brake arranged directly below the drum-wheel, as herein shown and described, whereby the weight of the drum, its wheel, and lever will all eoact by gravity to hold the load when the lever descends, as set forth.

2. In a hoisting-nnwhine, the combination, with a hoisti ng-drn 111 provided with a drivingpulley, of the slotted standards A, in which the said drum is mounted, a rod, 0, passing through the slots in the said standards, setserews screwing in the said standards and against the under side ot the said rod, and a ln'ake-shoe on the said rod, substantially as shown and described.

VOLNEY W. MASON.

Witnesses:

BENJAMIN F. FENNER, EDGAR II. Boss. 

